The iron-ore mines, ordered from south-west to north-east, are:
- Kudremukh (iv): Situated in the south-western region of Karnataka, India.
- Ballari (iii): Located to the north-east of Kudremukh, also within Karnataka.
- Bailadila (i): Found further north in Chhattisgarh.
- Mayurbhanj (ii): Situated in the north-eastern part of Odisha.
Therefore, the correct sequence is (iv), (iii), (i), and (ii), matching option (C).